Problem at bridging vertices
This looks to me like there are double vertices in your mesh. In Edit mode, press A to select all vertices, then Ctrl + V to open the vertex special menu, and click on Remove Doubles. 

It also seems like you selected a loop around the eye by choosing one vertex, and then pressing Ctrl while choosing a second. When you do this, every vertex along the shortest route between the two is also selected. I'm guessing you wanted to hit Shift but missed. It is super easy to hit something in Blender and have very unexpected and confusing results, when you are learning.